On AMC, JR has recently found love again after the tragic loss of his beloved Babe — with her fraternal twin sister, Marissa. But he is far from the only Pine Valley-ite to take sibling revelry to this extreme. Here are 15 (15! And it's not even a complete list!) other citizens who've been romantically intertwined with sibs.

Babe Carey: Babe was newly married to JR when she arrived in Pine Valley in 2003. One of her first moves was to hit the sheets with Jamie, unaware that he was JR's stepbrother! After her first divorce from JR, she became more formally linked to Jamie, but they split and she remarried JR.

Liza Colby: In 1996, over a decade after her romance with Tad, Liza took up with a handsome stranger she met while on an out-of-town jaunt ... who turned out to be Jake, Tad's baby brother, all grown up.

Alexandra Devane: Alex wed Dimitri in 1999, but by year's end, he was presumed dead. The next year, she took his half brother, Edmund, as a lover — which meant that she had some explaining to do when Dimitri turned up alive!

Amanda Dillon: After sleeping with JR in 2005, Amanda bedded his bro, Jamie, as well (and, oh yeah, drugged him in a failed attempt to get him to marry her).

Trevor Dillon: Trevor's sibling involvement was, shall we say, accidental: In 1991, psycho Janet made herself over in sister Natalie's image, dumped Nat into a well and took over her life; a none-the-wiser Trevor married faux Nat and got her pregnant! He ended up marrying the real Nat, who was killed in a car crash — then fell in love with a healed Janet for real and wed her. (Ultimately her mental illness returned and she killed Trevor, but that's another story....)

Erica Kane: Jackson and Erica were drawn together when they met in 1987, but she was taken — by his brother, Travis, whom she wed in 1988, the same year they welcomed baby Bianca. When Travis and Erica split in 1989, she and Jack became an item, but she remarried Travis in 1990 for Bianca's sake ... and kept sleeping with Jack! After the second Travis/Erica divorce, Jack and Erica spent many years circling around each other before marrying in 2005. Alas, they too ended up divorced.

Kendall Hart: Kendall has made it a family fair not once, but twice! Reeling from Ryan's rejection, Kendall bedded his brother, Jonathan, in 2004. (The fling was short-lived.) Prior to that, she had a sexual relationship with Michael Cambias, who turned out to be a psycho. Kendall is now on her third marriage to his brother, Zach Slater (a.k.a. Alexander Cambias, Jr.). (And we won't even get into the fact that in between these involvements, she'd been engaged to Zach's son, Ethan!).

Jonathan Lavery: Jonathan married autistic Lily in 2006, but the union didn't last. The next year, he found himself unable to resist his sexual pull to Lily's half sister, Ava.

Laurie Lewis: JR and Laurie started dating in 2002; by 2003, they split when Adam offered to pay her Harvard tuition if she dumped JR. Still, JR was crushed when he found out that it was his stepbrother, Jamie, to whom Laurie had moved.

Tad Martin: In 2005, Tad was rocked to the core when Dixie turned up alive after having been presumed dead for three years. It turned out that the woman, Di, was actually a Dixie imposter — and Dixie's heretefore unknown sister. Tad learned the truth but pursued a relationship with Di anyway, though it didn't last ... and when the real Dixie came back to town, she was none too pleased to learn of Tad's involvement with her sis!

Gloria Marsh: Glo fell hard for Stuart in 1993, but ended up leaving him at the alter for his twin, Adam, whom she later married (and divorced).

Bianca Montgomery: Binks nursed a major crush on Frankie in 2002. After Frankie's tragic murder, her twin, Maggie, moved to P.V. She became Bianca's best friend, and later, her lover.

Maria Santos: In 1996, during a rough patch in Maria's marriage to Edmund, she had a one-night stand with Dimitri, Edmund's half bro, which led to a "Who's the Daddy?" quagmire over the paternity of baby Maddie. (The little girl turned out to be Edmund's.)

Greenlee Smythe: In 2003, the year after the death of hubby Leo, Greens tentatively stepped back onto the dating scene, stepping out with Carlos, Fusion's janitor. Their relationship didn't last, but she rebounded with Juan Pablo, his brother. That, too, was short-lived.

Lincoln Tyler: Linc's marriage to Kitty ended tragically in 1977 when she died in his arms. But in 1980, the widower remarried — her twin sis, Kelly! They remain happily married (off-camera, naturally).